#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <string.h>
int main()
{
	char a [20] = "qi";
	char b[20] = "qiang";
	int i = 4;
	strcat(a, b);
	while (a[i++] != '\0')
		b[i] = a[i];
	puts(b);


	return 0; 
}